Commits on Mar 14, 2024

1. fabric: switch to maps for view rows …

   The `#view_row{}` record that is used for capturing messages with
   row data is not flexible enough to have it extended easily.  If
   one wanted to introduce a fresh field, the change would have to be
   propagated through many functions and modules.  Especially, if
   support for mixed-version clusters is a concern, this would come
   with some degree of duplication.
   
   Leverage Erlang/OTP's built-in maps for mitigating this issue and
   offer the view callbacks the `view_row_map` Boolean key in
   `#mrargs.extra` to request this communication format.  This way the
   old record-based format would be still in use unless requested
   otherwise.  This facilitates the smooth interoperability of old
   coordinators and new workers.  In parallel to that, the new
   coordinator could still receive view rows from old workers.

   

   pgj committed Mar 14, 2024
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